Humidifier



FIG. 1 is a perspective view of a humidifier showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another perspective view thereof.

The broken lines in the figures illustrate portions of the humidifier or the environment that form no part of the claimed design. 

CLAIM The ornamental design for a humidifier, as shown and described. 